Machine drive



E. R. HYDE momma DRIVE 2 Sheets-Sheet 1 Filed Dec. 7, 1922 INVENTORATTORNEYS.

E. R. HYDE MACHINE DRIVE Feb. 1925.

Filed Deg. 7, 1922 2 Sheets-Shee INVENTOR ATTORNEYS.

Patented Feb. 10, 1925.

ELWIN R. HYDE, O1? BBIDGEPORT, CONNECTICUT, ASSIGNOR TO THE BRIDGEPORTSAFETY EMERY WHEEL COMPANY, INCORPORATED, 0F BBIDGEPORT, CONNECTI- OUT,A CORPORATION OF CONNECTICUT.

MACHINE DRIVE.

Application filed December '7, 1922. Serial No. 605,381.

To all whom it may concern:

Be it known that I, ELWIN R. HYDE, a citizen of the United States,residing at Bridgeport, county of Fairlield, State of Connecticut, haveinvented an Improvement in Machine Drives, of which the following is aspecification.

This invention relates to machine drives and particularly to a drivingconnection between two shafts or spindles which rotate at a fairly highspeed.

It is an object of my invention to provide a. driving means between suchshafts which will not become overheated in operation and in which meansis provided for cooling the power transmitting means between the shaftsor spindles.

It is a further object of the invention to provide means whereby thedriving connection may run in a bath of oil with means for cooling thisoil to thus keep the driving connection from becoming overheated.

ith the foregoing and other objects in view, I have devised theconstruction illustrated in the accompanying drawings. Although my driveis of general application it is adapted for running different types ofmachines, but for the purpose of illustration I have shown it as appliedto a buffing lathe, and in the drawings- Fig. 1 is a front view of abuffing lathe showing my improved drive applied thereto.

Fig. 2 is an end view thereof looking from the left of Fig. 1.

Fig. 3 is a top plan view of the drive with a portion of the uppersection of the enclosing casing broken away to more clearly show theconstruction.

Fig. 4: is a longitudinal section substantially on line H of Fig. 3, and

Fig. 5 is a transverse section through the casing substantially on line5-5 of Fig. 4.

With A. C. motors for two or three phase equipment the standard windingsfor buffing machines are usually for 1800 or 3600 M.-and'there isnothing in between. However, in buffing practice the bulk of the buffingspindles are operated at from 2200 to 2800. R. P. M. according to thesize of the buff, the general practice being to run a 12" buff at about2500 R. P. M. and as buffers are accustomed to working on spindlesrunning at this speed it is very diflicult to get them to operate withbuds running at other speeds, therefore, if the motors are directlyconnected to the buffing spindles these spindles either run too slow ortoo fast. Therefore, in order to'use these motors and secure the properspeed for the spindles it is necessary to provide some form of drivebetween the motor and buffing spindles which either give a step-up drivewhen the low speed motor is used, or a step-down drive when the highspeed motor is used.

For these relatively high speeds various types of driving means may beused, but I have found that the improved silent chain drive running oversuitable sprockets on the spindles is most satisfactory, asusually themotor and builing spindles are fairly close together in ordinaryoperation. However, under the high operating speed these drives quicklybecome overheated and l. have, therefore, provided means for maintainingthem at the proper temperature.

Referring now to the specific application illustrated, 10 represents thebase or pedestal upon which the shaft or spindle 11 to be driven ismounted to rotate in suitable bears ings 12, and in the present instancethis shaft carries suit-able buffing. wheels 13, although of courseother tools may be operated thereby if desired. Extending from therearof the pedestal is a sup-porting bracket 1 L on which is mounted theelectric motor 15 for driving the spindle 11 and this motor rotates thedriving shaft 7 or spindle 16. These shafts aresubstantially paralleland spaced a suitable distance from each other. On the motor spindle 15is a sprocket 17, and on the driven spindle 11 is a sprocket 18 overwhich runs a suitable silent chain 19 of the usual construction. As thischain and sprocket drive is of standard construction I have not shownitin detail, but have merely indicated it in, outline. The sprockets 17and 18 areof course given different sizes depending upon the relativespeed desired between the two spindles. In the pres ent layout the highspeed motor is used sothat a step-down drive to the tool spindle isemployed and thus the driving sprocket 17 is smaller than the drivensprocket 18.

As this chain is driven at a relatively high speed it soon becomesunduly heated unless some means is provided for maintaining it attheproper temperature. For this purpose I enclose the driving means in asuitthe air.

able casing, preferably comprising an upper section 20 and a lowersection 21 secured together by suitable flanges 22 through which passsuitable screws or bolts 23. The lower section is adapted to hold asuitable "oath of" oil, as indicated at 2%, which is of suflicientneight to come up about the lower portion of the chain. Even with thisoil bath I have found that the highA-speed tends tocause the drive tobecome unduly heated and I have, therefore, I provided means a forcooling the oil and thus the drive. Of course when the drive operatesthe oil is thrown against the ends ofthe casing, and in vfact 'there ismore or less of a fine spray-of oil within "the casing as it is thrownout by the chain as it passes over the sprockets. I have, therefore,provided on vthe neuter walls of the casing suitable heat radiating:ribs or fins 25 which will-conduct heat away from the casrng andthe-011 "to the surrounding atmosphere. 'Io suppleinenttl-ie cool ing:action :of these fins I also provide means for circula'ting through thecasing a cooling fluid, such as arr, :and as thei'oil within the casingis more or less of afine spray this circulation covered with: afine"wire n1csh screen '28 to keep dirt froin passin 'into the casingwith and-preferably in the upper wallzof the casing 1 provide on outletvopening 29 :for this air; This opening is placed soinewhat for-. werdly of the sprocket '18 so that ,:-the oilq thrown off from the-chainpassing over ithis sprocket will not'be thrown=out this opening. .I

If it is found desirable, however, suitable hemes on screens maybeprovided in this out-- let opening toseparate any oil air-0111 the airshould-it be foundthat oil is being-carried ou't'by the air.

' "130 also give a morenreliable lubrication for the cha1n'I providemeans 'for collecting oilas'it runs down the innersi'rrface'of' theeasing walls,-and dischargingithis 1011 onto the-inner sid'e of the "chan such as the-upper'side 'ofthe lower run. This 11182111860111:

prises trough 30 open at its upper side and resting against the innerwall of the easingand having aportion extending inwardly, as shown at31, between the upper and lower runs of the chain, and arranged todischarge the oil collected-bytheatrough 'ontothe top of the lower run.WVhere-the shafts, passthrou'gh the *side walls "of the casing I preferto provide a suitable packing T-hegfan blades are preferably in-vclin'ed somewhat so :as to draw thezra-iri through the inlet opening.into the ;casi=ng,

zcasi ng t-ofcool the oil and chain.

around the same to prevent oil passing out on these shafts. Such apacking is shown in Fig. 3 and comprises preferably an annular groove inthe'casing to hold asuitable packing 32'eni' oracing the shaft.

' It is believed the-operation will-beapparenti-from the foregolngdescription. As the cool a1r 1s drawn into the inlet opening 2 by thefan 26 it comes in contact with the finely divided oil thrown out by thedriving means and cools the same. The airipasses out the outlet 29fandthe'cooled oil flows to" .the bottoin of the :casing to be again pickedyup ibyithetriving neans,or is conducted to the drive by ineansof thetrough 30. As the 'oil is thrown against the casing-part of the heat isconducted therefrom and disseminated by thetins 25. -It will thus beseen that I have provided I-IHQELIIS whereby these short 'drives'inay beemployed for relatively high speeds without overheating.

' l la'vingthusset forth the nature of my invention, what I ca-i111is 1. In a, niachinedrive, two substantially parallel spaced sl1a='fts,sprockets secured to said-shafts, :a chain driveabout said sprocketswhereby one shaft may be driven by the other, 'nieans for rotating thedriving shaft,

a casingabout the -sprockets and chain and adapted to hold an Ol'ibdthfor a portion the chain, and means within the casing for circulating acording fluid through said casing. 7

v. 2. In a machine drive, two shafts, a driving connection between saidshaft, a casing;

about, said driving means adapted to hold a bath of 0 11 fora port-101iof the driving means to run in, and-means within the cas- -i-ng, forcirculating a--cooling fluid through said casing. 7 I V p p p In aanachinedrive, two substantially paua lle'l,shafts, sprockets secured to:said shafts, @a {driving chain connecting said sprockets, means forrotating one of said shafts, a casing enclosing the chain and-"sprockets and adapted to hold albath of oil 1 for a portion of thechain, and means within the casing for circulating air througlr'the l.In ainachine drive, two sh ing connection between said shafts, a casingenclosing said driving connection and pro vided with an air inletopeningand an outlet opening, a fan adjacent the inlet 0penfts, a driv- Ii-ng'driven by one of said shafts and arranged-to draw air into thecasing through said openingpand a bath of oil in said casing about aportion 'ofsaid driving connection.

' '5. In a mach ne drive, two substantially parallel shafts, a drivingconnection between said shafts comprising sprockets seoured tothe shaftsanda drivingchain rum ning on saidsprockets, a casing enclosing saiddriving connection and provided with an air inlet opening and an airoutlet opening, a fan adjacent said inlet opening driven by one of saidshafts and arranged to circulate air through the casing from said inletopening to the outlet opening, and an oil bath in said casing enclosinga portion of said chain.

6. In a machine drive, twosubstantially parallel shafts, a drivingconnection between said shafts comprising sprockets secured to theshafts and a driving chain running on said sprockets, a casing enclosingsaid driving connection and provided With an air inlet opening and anair outlet opening, said casing being adapted to hold an oil bath for aportion of the chain, means for circulating air through the casing fromthe inlet to the outlet opening, and means arranged to direct oil fromthe interior walls of the casing to the inside of the chain.

T. In a machine drive, two substantially pa *allel shafts, a drivingconnection between said shafts comprising sprockets secured to theshafts and a driving chain running on said sprocket-s, a casingenclosing said driving connection and provided with an air in letopening and an air outlet opening, said casing beingada-pted to hold anoil bath for a portion of the chain, a fan adjacent the inlet openingdriven by one of said shafts and arranged to circulate air through thecasing from said inlet opening to the outlet opening, and a trougharranged to collect oil running down the inner surface of one of wallsof the casing and direct it to the top or inner side of the lower run ofthe chain.

8. In a machine drive, a pair of shafts, a pair of sprockets carried bysaid shafts, a driving chain on said sprockets, a casing enclosing thesprockets and chain and con taining a bath of oil for a portion of thechain to run in, said casing being provided with an air inlet and outletopenings, a fan driven by one of the said shafts for circulatingcoo-ling air through said casing from the inlet to the outlet, and heatradiating fins on the exterior of the casing.

9. In a machine drive, a pair of shafts, a pair of sprockets carried bysaid shafts, a driving chain on said sprockets, a casing enclosing thesprockets and chain and containing a bath of oilfor a portion of thechain to run in, said casing being provided With air inlet and outletopenings, a fan driven by one of the said shafts for circulating coolingair through said casing from the inlet to the outlet, heat radiatingfins on the exterior of the casing, and a trough arranged to collect oilrunning down the inner surface of the casing and direct it to the top orinner side of the lower run of the chain.

In testimony whereof I affix my signature.

ELWIN R. HYDE.

